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WINDOW Statement Details
 
Syntax
  WINDOW [[SCREEN] (x1,y1)-(x2,y2)]
 
The WINDOW statement allows the user to create a customized coordinate
system to draw lines, graphs, or objects without being constrained by the
screen's physical coordinates (the dimensions of the screen). This is
done by redefining the screen-border coordinates with the "view coordinates"
(x1, y1) and (x2, y2). These view coordinates are single-precision numbers.
 
WINDOW defines the section of the view coordinate system that is mapped to
the physical coordinates of the screen. All subsequent graphics statements
use these new view coordinates and are displayed within the current
viewport. (The size of the viewport can be changed with the VIEW statement.)
 
The RUN statement, or WINDOW with no arguments, disables the window
transformation.
 
The WINDOW SCREEN variant inverts the normal Cartesian direction of the
y coordinate, so y values go from negative to positive from top to bottom.